Join a team building a new data platform for the maritime industry. The system is based on microservices and event-driven communication. It works both in the cloud (Azure) and on-premises, even without internet. Real-time data processing, offline identity, and IoT sensor integrations are key features.Key responsibilities: Test systems built with microservices and event-driven queues Create clear test plans and documents that work for large, spread-out systems Check if the system works both online and offline, and during real-time data use Validate IoT data from many sensors Use tools like Kafka, SQL/NoSQL databases, and web testing frameworks Build and update custom test tools, ideally with C# or similar languages Ideal candidate profile: At least 4-5 years of experience as QA Skilled in C# or similar languages Strong experience in testing distributed systems and integrations Know event-driven systems (Kafka or ActiveMQ or MQTT) Able to work with SQL and NoSQL databases (like SQL Server, MongoDB) Experience using web test tools (like Selenium or Playwright) Know how to build or improve testing frameworks Experience with handling and checking IoT data, even with delays Conditions: Form of employment: B2B Rate: Negotiable, based on your experience and skills, we are open 100% remote work from Poland Benefits: private medical care, life insurance, 50% Multisport, AWS exam funding Recruitment steps: Screening call with Recruiter (20-30 min.) Meeting with Client's HR team (approx. 30 min.) Meeting with QA Engineer from the future team (1h) Decision and feedback